Convert //ios from scoped_ptr to std::unique_ptr.

ios/web/public/test/test_web_thread.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_H_
 #define IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/web/public/web_thread.h"
 
 namespace base {
 class MessageLoop;
 }
 
 namespace web {
 
 class TestWebThreadImpl;
 
@@ skipping 17 matching lines @@
   // Starts the thread with an IOThread message loop.
   bool StartIOThread();
 
   // Stops the thread.
   void Stop();
 
   // Returns true if the thread is running.
   bool IsRunning();
 
  private:
-  scoped_ptr<TestWebThreadImpl> impl_;
+  std::unique_ptr<TestWebThreadImpl> impl_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWebThread);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_H_